Question

47+21×3-29; 900-105×3+42

Answer 1

1. 21*3=63, 47+63=110,110-29=81 ответ 81
2. 105*3=315, 900-315=585, 585+42=627 ответ 627

Answer 2

To solve these mathematical expressions, we need to follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction):

1. Parentheses
2. Exponents
3. Multiplication and Division (performed left to right)
4. Addition and Subtraction (performed left to right)

Let's solve the first expression:

47 + 21 × 3 - 29

Using PEMDAS, we first perform multiplication:

47 + 63 - 29

Next, we perform addition and subtraction from left to right:

110 - 29

= 81

Therefore, 47 + 21 × 3 - 29 = 81.

Now, let's solve the second expression:

900 - 105 × 3 + 42

Using PEMDAS, we first perform multiplication:

900 - 315 + 42

Next, we perform addition and subtraction from left to right:

585 + 42

= 627

Therefore, 900 - 105 × 3 + 42 = 627.